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What Is Form I-9?

Form I-9 is a term used in the recruitment and staffing industry.

Compliance & DataUpdated March 2026

Why Form I-9 Matters in Recruitment

Every person hired to work in the United States must have an I-9 on file. No exceptions based on citizenship, immigration status, or employment type. Staffing agencies bear this obligation for every W-2 contractor they place, and a single audit can expose deficiencies across hundreds of worker files simultaneously. Civil penalties for substantive I-9 violations range from $281 to $2,789 per violation for a first offense; repeated violations or evidence of knowing employment of unauthorized workers carry criminal liability. The risk is not theoretical: ICE conducted over 6,000 worksite enforcement actions in fiscal year 2024, with I-9 audits as the primary compliance tool.

Form I-9, Employment Eligibility Verification, was created by the Immigration Reform and Control Act of 1986. It has three sections: Section 1, completed by the employee on or before the first day of work; Section 2, completed by the employer within three business days of the start date after physically examining the employee's identity and work authorization documents; and Section 3, used for reverification when work authorization expires. Employers must accept any documents that appear genuine from the document lists on the form's instructions and cannot demand specific documents or additional documents based on national origin or citizenship status, which would constitute discrimination under the Immigration and Nationality Act.

For staffing agencies, the employer of record is typically the staffing firm, not the client. That means the agency conducts and retains the I-9, not the client. If a client site is audited and agents discover workers without valid I-9s, the staffing firm is the liable party. Some firms allow clients to complete I-9s on their behalf through an agent arrangement, but the legal obligation and exposure remain with the agency.

How Form I-9 Works

The I-9 process has three phases. During hiring, the employee completes Section 1 on or before their first day. They attest to their citizenship or immigration status and sign under penalty of perjury. During onboarding, the employer representative physically examines the employee's documents, records the document details in Section 2, and signs within three business days. The documents must come from List A (documents establishing both identity and work authorization, such as a US passport or Permanent Resident Card) or a combination of one List B document (identity) and one List C document (work authorization). Employers cannot request more documents than this.

For remote workers, the physical document examination requirement created significant compliance challenges until 2023, when DHS introduced authorized alternative procedures allowing designated E-Verify participants to remotely examine documents via video call, with additional storage requirements. Employers not enrolled in E-Verify still must have someone physically examine documents in person, which requires either the employer having a local representative or using an authorized agent.

Retention rules require employers to keep I-9s for three years after the date of hire or one year after employment ends, whichever is later. For staffing agencies with high contractor turnover, this means maintaining years of I-9 records for workers who may have worked a single day. Electronic I-9 storage systems are permitted and have audit trail requirements.

Form I-9 vs E-Verify

I-9 is mandatory for all employers. E-Verify is a federal database system that employers can use to electronically confirm I-9 document information against DHS and Social Security Administration records. E-Verify is voluntary for most private employers but mandatory for federal contractors and in several states that require it for some or all employers. E-Verify does not replace the I-9; it supplements it. A completed I-9 is required regardless of E-Verify participation.

Form I-9 in Practice

Carlos manages compliance at a large healthcare staffing firm in Houston. His firm places nurses and allied health professionals across Texas, Oklahoma, and Louisiana. Given the volume of placements (roughly 600 new starts per year) and the regulatory environment in Texas (which mandates E-Verify for state agency contractors), Carlos runs a standardized onboarding workflow: Section 1 is completed through their digital I-9 platform on the offer acceptance date, a regional coordinator meets the worker on day one to verify documents in person and complete Section 2, and the completed I-9 is stored in the firm's electronic system with a seven-year retention schedule (longer than required as a buffer). When a worker's work authorization document is set to expire, the system sends an automatic alert 90 days out for reverification. Carlos runs a quarterly internal audit of a random sample of I-9s to catch errors before an external audit would.

What Is Form I-9? | Candidately Glossary | Candidately